Handle JsonException when deserializing answerJson

[jaliyaudagedara]

Purpose

When the answerJson is not a JSON, provide a more informative message.

Example

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[x] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

[IEvangelist]

Suggested change

	catch (JsonException)
	catch (JsonException je)

[IEvangelist]

Suggested change

	throw new InvalidOperationException($"Unable to cast '{answerJson}' as JsonElement.");
	throw new InvalidOperationException(
	message: $"Unable to cast '{answerJson}' as JsonElement.",
	innerException: je);